Is the nuclear threat real? What does Putin want? Who is winning the war in Ukraine? We took questions on the invasion from young people around the world and looked for answers from BBC correspondents.

Jackie Leonard speaks to Martin Forster, a senior child psychologist with the healthcare company, Kry, in Sweden. Listeners' questions are tackled by Vitaliy Shevchenko, Paul Adams, Theo Leggett, Lyse Doucet and Mark Lowen.